"Because you were my friend and I trusted you. That's why you should've believed me." The Master grabbed at his short hair in frustration and mentally screamed. When he'd finally calmed down, he turned to face the Doctor. "Do you know why it was always Earth? Think about it. Of all the places I could go, or all the planets out there that were available to me... Why do you think it was usually Earth?"
He walked over and sat back down on the couch. "The drumming in my head is completely gone now," he said quietly. "They're probably taking the tracker off soon since I was relatively cooperative with the shrink. But I just... I don't see a purpose in being here. That's why I want you to say it. Give me a reason to stay, Theta."